Shampoo



Patented Apr. 8, 11

I ll,

John w. Orelu ,Summlt, N. s.

No Drawing. Application July 25, 1935,

- Serial No. 33,057

4 Claims.

My present invention relates to an improvement in hair washes orshampoos.

Many attempts have been made to provide materials other than soap forwashing the hair for the purpose of avoiding the usual destructiveaction of soap. The normal action of even a neutral soap when put intosolution is to set free as much as one-half of its alkali. This alkalihas a destructive action upon the hair fiber. Moreover, human hairnormally has deposited upon it a sheath of lime and magnesium depositsconsisting of carbonates, lime and magnesium soaps formed from thenatural oils on the hair. Ordinary washing with soap will not removethese coatings and the hair retains its dull, lustreless appearance.Neutral sulphonated castor and other oils do not foam and leave the hairslightly sticky.

Furthermore, many of these sulphonated products which are used inshampoos to avoid the result of the action of soap on hair, havethemselves the harmful characteristic of causing a great amount ofdrying of the scalp due to a large water absorption.

The presence of considerable amounts of immersing a swatch of it in adilute solution of hydrochloric acid; bubbles of carbondioxide are setfree.

- I have found that the salts of sulphonic esters I of themonoethanolamides of the cocoanut fatty acids do not hydrolize to freealkali to attack the hair, nor do they have the property of causing anunhealthy removal of cell water which results in a drying of the scalp.The ethanolamine salts,

especially the monoethanolamine salt and the ammonium salts, are ofgreater advantage than the sodium and other salts due to their higherfoaming power and property of remaining liquid in concentrated solution.No lime or other insoluble salts are formed when using hard water, andthe insoluble soaps previously deposited upon the hair by washing withhard water are removed. A good foam is obtained, and due to the highdetergent value the hair is cleaned completely in one wash and rinsing,whereas with soap several washings and many rinsings are required. Someof the advantages of the salts of sulphonic esters of alkanolamides offatty acids are still retained by mixing with soap. Among these may bementioned the high detergent values and resistance to hard water.Mixtures up to .with soap can be used. The following are examples of myimproved liquid hair shampoo:

Per cent Monoethanolamine salt of the sulphonic ester ofmonoethanolamide of the cocoanut fatty The sulphonic esters of themonoethanolamides of the cocoanut fatty acids are best prepared inaccordance with the methods set forth in my United States Letters PatentNo. 1,981,792. While inferior for the purpose to the non-metallicsoluble salts specified, the sodium salts of my improved detersiveagents may also be employed.

1 claim:

- 1. An improved shampoo. containing as the active ingredient themonoethanolamine salt of the sulphonic esters of monoethanolamide of thecocoanut fatty acids in an aqueous vehicle.

2. An improved shampoo containing as the active ingredient the ammoniumsalt of the sulphonic esters of monoethanolamide of the cocoanut fattyacids in an aqueous vehicle.

3. An improved shampoo containing as the active ingredient a watersoluble non-metallic salt of the sulphonic esters of monoethanolamide ofthe cocoanut fatty acids in an aqueous vehicle.

4. improved shampoo, containing as the active ingredient a water solublesalt of the sulphonic esters of monoethanolamide of the cocoanut fattyacids in an aqueous vehicle, said ingredient being characterized by highfoaming power due to the absence of formation of lime or other insolublesalts. the property of remaining liquid in concentrated solution, highdetergent value, and the property of being non-injurious to the scalp orhair due to low imbibation and the absence of the formation of freealkali.

JOHN W. ORELUP.

